Podman does support docker API so you can use something like the OpenTelemetry Collector to fetch metrics using the docker API and forward them to prometheus.

Collector: https://github.com/open-telemetry/opentelemetry-collector-co...

Docker receiver: https://github.com/open-telemetry/opentelemetry-collector-co...

Prometheus exporters: https://github.com/open-telemetry/opentelemetry-collector-co... and https://github.com/open-telemetry/opentelemetry-collector-co...

OpenTelemetry will soon support native Podman API as well.